Improvement in printers  quoins



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UNITED' STATES PATENT CDEEIGE.A

GEORGE B. "POLEN, OE PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN PRINTERS QuoINs.

Specification forming part of Letters Patent No. 173,493, dated February l5, 1876; application filed November 16, 1875.

` adelphia and State of Pennsylvania, have invented certain'new and useful Improvements in Quoins for Locking Printers7 Forms; and I do hereby declare that the following' isa full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters ot' reference marked thereon, which form a part of this specifica- IIigure 1 is a top view. Fig. 2 is a sectional view, showing the connecting-bolts and spiral springs and recesses in the plates. Fig. 3 is a transverse section, showing the tapering screw partly in the female screws in the plates. f

My invention relates to quoins for locking up printers forms; and consists of a tapering screw in tapering female screws through the inner sides Ot' two plates, adjustablelaterally, as hereinafter more t'ully described.

A B are the adjustable plates, having tapering female screws b through theirinner sides, to receive the tapering screw (5, as Ashown in the drawings. The top end ofthe screw C is provided with a square hole, f, to receive the I end ot a key, E, by which the screw is operatkey in the square hole j', the tapering screw is 4by Letters Patent, is-

1. A prin ters quoin oftwo adjustable plates,

A B, having tapering female screws b', in corn'- bination with a tapering screw, C, substantially as and for the purposes described.

2. A printers quoin ot'two adjustable plates, A B, connected by bolts -b b, and having tapering female screws b and recesses c, in combination with tapering screw G and spiral springs d, substantially as and for the purposes described.

In testimony that I claim the foregoing as my own invention I afiix my signature in presence ot' two witnesses.

GEORGE B. POLEN.

Witnesses:

GEO. ARMSTRONG, WALTER H. LUEE. 

